Multiple component UIPickerView in swift 4

Multiple component UIPickerView in swift

As the title of this post says, Multiple component UIPickerView in swift. So in this tutorial, we are going to learn, how to create multiple component or multi component UIPickerView in swift. Generally a UIPickerView contains only single component, it is the default behavior of UIPickerView, but sometimes during app development we required two or more components, two or more lists to be displayed inside single UIPickerView. In this tutorial we are going to covered the same thing i.e. creating a UIPickerView with multiple components(Will create two components for our UIPickerView). So let us start the tutorial

Steps to create Multi-Component UIPickerView

Step 1: Create a new xcode project by selecting "Single View App" template and name it "Multicomponent UIPickerView". Note: Please select development language as swift.

Step 2: Open "Main.storyboard" file.

Step 3: Drag an UIPickerView object from object library and an UILabel, so that we can display our output of the picker selection.

Step 4: Add constraints to UIPickerView and UILabel as shown in the image.

Step 5: Open "ViewController.swift" file and first declare our IBOutlet's to both the controls, dragged in step 3.

Step 6: Open "Main.storyboard" and connect both IBOutlet's with the respective objects.

Step 7: In order to populate UIpickerView with our desired values or options we will take two arrays. With these arrays we will populate our UIPickerView.

UIPickerViewDataSource and UIPickerViewDelegate

Step 8: As we are done with are arrays, its time to write down UIPickerViewDataSource and UIPickerViewDelegate methods.

Step 9: If you run the code, you will see the following output.

On changing values, you will notice that label value will not be updated. So let us fix this problem.

UIPickerView row selection(get value selected by user)

Step 10: To detect a picker selection, we need to implement another delegate method named as "didSelectRow". Below is the code

Step 11: Run the code and you will see whenever you change UIPickerView values, label will get updated.

Complete code:

Where to go from here:

In this tutorial, we learned how to create and use multiple component UIPickerView or multi component picker in swift language (swift3 / swift4).